The way to do it is to use NSAttributedString
like this:
NSMutableAttributedString *text =
[[NSMutableAttributedString alloc]
initWithAttributedString: label.attributedText];
[text addAttribute:NSForegroundColorAttributeName
value:[UIColor redColor]
range:NSMakeRange(10, 1)];
[label setAttributedText: text];
I created a UILabel
extension to do it.
I have done this by creating a category
for NSMutableAttributedString
-(void)setColorForText:(NSString*) textToFind withColor:(UIColor*) color
{
NSRange range = [self.mutableString rangeOfString:textToFind options:NSCaseInsensitiveSearch];
if (range.location != NSNotFound) {
[self addAttribute:NSForegroundColorAttributeName value:color range:range];
}
}
Use it like
- (void) setColoredLabel
{
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithString:@"Here is a red blue and green text"];
[string setColorForText:@"red" withColor:[UIColor redColor]];
[string setColorForText:@"blue" withColor:[UIColor blueColor]];
[string setColorForText:@"green" withColor:[UIColor greenColor]];
mylabel.attributedText = string;
}
SWIFT 3
extension NSMutableAttributedString{
func setColorForText(_ textToFind: String, with color: UIColor) {
let range = self.mutableString.range(of: textToFind, options: .caseInsensitive)
if range.location != NSNotFound {
addAttribute(NSForegroundColorAttributeName, value: color, range: range)
}
}
}
USAGE
func setColoredLabel() {
let string = NSMutableAttributedString(string: "Here is a red blue and green text")
string.setColorForText("red", with: #colorLiteral(red: 0.9254902005, green: 0.2352941185, blue: 0.1019607857, alpha: 1))
string.setColorForText("blue", with: #colorLiteral(red: 0.2392156869, green: 0.6745098233, blue: 0.9686274529, alpha: 1))
string.setColorForText("green", with: #colorLiteral(red: 0.3411764801, green: 0.6235294342, blue: 0.1686274558, alpha: 1))
mylabel.attributedText = string
}
SWIFT 4 @kj13 Thanks for notifying
// If no text is send, then the style will be applied to full text
func setColorForText(_ textToFind: String?, with color: UIColor) {
let range:NSRange?
if let text = textToFind{
range = self.mutableString.range(of: text, options: .caseInsensitive)
}else{
range = NSMakeRange(0, self.length)
}
if range!.location != NSNotFound {
addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range!)
}
}
I have did more experiments with attributes and below are the results, here is the SOURCECODE
Here is the result
Here you go
NSMutableAttributedString * string = [[NSMutableAttributedString alloc] initWithString:lblTemp.text];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0,5)];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(5,6)];
[string addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(11,5)];
lblTemp.attributedText = string;
Swift 4
// An attributed string extension to achieve colors on text.
extension NSMutableAttributedString {
func setColor(color: UIColor, forText stringValue: String) {
let range: NSRange = self.mutableString.range(of: stringValue, options: .caseInsensitive)
self.addAttribute(NSAttributedStringKey.foregroundColor, value: color, range: range)
}
}
// Try it with label
let label = UILabel()
label.frame = CGRect(x: 70, y: 100, width: 260, height: 30)
let stringValue = "There are 5 results."
let attributedString: NSMutableAttributedString = NSMutableAttributedString(string: stringValue)
attributedString.setColor(color: UIColor.red, forText: "5")
label.font = UIFont.systemFont(ofSize: 26)
label.attributedText = attributedString
self.view.addSubview(label)
Result
Swift 3
func setColoredLabel() {
var string: NSMutableAttributedString = NSMutableAttributedString(string: "redgreenblue")
string.setColor(color: UIColor.redColor(), forText: "red")
string.setColor(color: UIColor.greenColor(), forText: "green")
string.setColor(color: UIColor.blueColor(, forText: "blue")
mylabel.attributedText = string
}
func setColor(color: UIColor, forText stringValue: String) {
var range: NSRange = self.mutableString.rangeOfString(stringValue, options: NSCaseInsensitiveSearch)
if range != nil {
self.addAttribute(NSForegroundColorAttributeName, value: color, range: range)
}
}
Result:
//NSString *myString = @"I have to replace text 'Dr Andrew Murphy, John Smith' ";
NSString *myString = @"Not a member?signin";
//Create mutable string from original one
NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] initWithString:myString];
//Fing range of the string you want to change colour
//If you need to change colour in more that one place just repeat it
NSRange range = [myString rangeOfString:@"signin"];
[attString addAttribute:NSForegroundColorAttributeName value:[UIColor colorWithRed:(63/255.0) green:(163/255.0) blue:(158/255.0) alpha:1.0] range:range];
//Add it to the label - notice its not text property but it's attributeText
_label.attributedText = attString;
Since iOS 6, UIKit supports drawing attributed strings, so no extension or replacement is needed.
From UILabel
:
@property(nonatomic, copy) NSAttributedString *attributedText;
You just need to build up your NSAttributedString
. There are basically two ways:
Append chunks of text with the same attributes - for each part create one NSAttributedString
instance and append them to one NSMutableAttributedString
Create attributed text from plain string and then add attributed for given ranges – find the range of your number (or whatever) and apply different color attribute on that.
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